Affordable Limousines

Hello, my dear Londoners!
I'd like some advice on affordable limousines and wedding transportation! I've sent several inquiries, and the price for a three-hour drive (from the ceremony venue to the photo shoot and reception) is quite high!!
I'm not looking for something super-chic. If you have any transportation ideas, please let me know.

London is a city with a huge selection, and here you can really find interesting options without paying for classic wedding packages, which are often unreasonably expensive because of the word "wedding".
If the limousines go beyond the budget, consider alternatives that add London charm and cost less.